//计时器1  30秒
$(document).ready(function () {
  var GobackTimer = 30;
  var countdown = null;

  function timeShow() {
      GobackTimer--;
      $(".countdown").html("倒计时" + GobackTimer + "秒");
      if (GobackTimer < 1) {
      clearInterval(countdown);
      //$(".countdown").html("倒计时结束！！");
      window.opener = null;
      window.location.href = "SelfService.aspx";
    }
  };
  countdown = setInterval(timeShow, 1000);
});




